/**
 * @file
 * Error Management module
 *
 */

/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */

#include "lwip/err.h"
#include "lwip/def.h"
#include "lwip/sys.h"

#include "lwip/errno.h"

#if !NO_SYS
/** Table to quickly map an lwIP error (err_t) to a socket error
  * by using -err as an index */
static const int err_to_errno_table[] = {
  0,             /* ERR_OK          0      No error, everything OK. */
  ENOMEM,        /* ERR_MEM        -1      Out of memory error.     */
  ENOBUFS,       /* ERR_BUF        -2      Buffer error.            */
  EWOULDBLOCK,   /* ERR_TIMEOUT    -3      Timeout                  */
  EHOSTUNREACH,  /* ERR_RTE        -4      Routing problem.         */
  EINPROGRESS,   /* ERR_INPROGRESS -5      Operation in progress    */
  EINVAL,        /* ERR_VAL        -6      Illegal value.           */
  EWOULDBLOCK,   /* ERR_WOULDBLOCK -7      Operation would block.   */
  EADDRINUSE,    /* ERR_USE        -8      Address in use.          */
  EALREADY,      /* ERR_ALREADY    -9      Already connecting.      */
  EISCONN,       /* ERR_ISCONN     -10     Conn already established.*/
  ENOTCONN,      /* ERR_CONN       -11     Not connected.           */
  -1,            /* ERR_IF         -12     Low-level netif error    */
  EMSGSIZE,      /* ERR_MSGSIZE    -13     Message too long. */
  ENODEV,        /* ERR_NODEV      -14     No such device. */
  ENXIO,         /* ERR_NODEVADDR  -15     No such device or address. */
  EDESTADDRREQ,  /* ERR_NODEST     -16     socket is not connection-mode & no peer address is set. */
  ENETDOWN,      /* ERR_NETDOWN    -17     Network is down. */
  EAFNOSUPPORT,  /* ERR_AFNOSUPP   -18     Address family not supported by protocol. */
  EADDRNOTAVAIL, /* ERR_NOADDR     -19     Cannot assign requested address */
  EOPNOTSUPP,    /* ERR_OPNOTSUPP  -20     Operation not supported on transport endpoint */
  ENETUNREACH,   /* ERR_NETUNREACH -21     No route to the network */
  ETIMEDOUT,     /* ERR_CONNECTIMEOUT -22  Connection request timedout */
  EPIPE,         /* ERR_PIPE       -23     PIPE Error. */
  EAFNOSUPPORT,  /* ERR_AFNOSUPPORT -24    AF not supported */
  ENOPROTOOPT,   /* ERR_NOPROTOOPT -25     Protocol not available */
  EACCES,        /* ERR_ACCESS     -26     Error to access */
  ENFILE,        /* ERR_NFILE      -27     Socket out of resources */
  EIO,           /* ERR_RESERVE3   -28     Reserved for future use */
  EIO,           /* ERR_RESERVE4   -29     Reserved for future use */
  EIO,           /* ERR_RESERVE5   -30     Reserved for future use */
  EIO,           /* ERR_RESERVE6   -31     Reserved for future use */
  EIO,           /* ERR_RESERVE7   -32     Reserved for future use */
  ECONNABORTED,  /* ERR_ABRT       -33     Connection aborted. */
  ECONNRESET,    /* ERR_RST        -34     Connection reset. */
  ENOTCONN,      /* ERR_CLSD       -35     Connection closed. */
  EIO,           /* ERR_ARG        -36     Illegal argument. */
  ECONNREFUSED,  /* ERR_CONNREFUSED -37    Connection refused. */
  -2,            /* ERR_MAX_VAL    -38     Invalid error */
};

int
err_to_errno(err_t err)
{
  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) {
    return EIO;
  }
  return err_to_errno_table[-err];
}
#endif /* !NO_SYS */

#ifdef LWIP_DEBUG

static const char *err_strerr[] = {
  "Ok.",                    /* ERR_OK          0  */
  "Out of memory error.",   /* ERR_MEM        -1  */
  "Buffer error.",          /* ERR_BUF        -2  */
  "Timeout.",               /* ERR_TIMEOUT    -3  */
  "Routing problem.",       /* ERR_RTE        -4  */
  "Operation in progress.", /* ERR_INPROGRESS -5  */
  "Illegal value.",         /* ERR_VAL        -6  */
  "Operation would block.", /* ERR_WOULDBLOCK -7  */
  "Address in use.",        /* ERR_USE        -8  */
  "Already connecting.",    /* ERR_ALREADY    -9  */
  "Already connected.",     /* ERR_ISCONN     -10 */
  "Not connected.",         /* ERR_CONN       -11 */
  "Low-level netif error.", /* ERR_IF         -12 */
  "Message too long.",          /* ERR_MSGSIZE    -13 */
  "No such device.",            /* ERR_NODEV      -14 */
  "No such device or address.", /* ERR_NODEVADDR  -15 */
  "socket is not connection-mode & no peer address is set.", /* ERR_NODEST  -16 */
  "Network is down.",           /* ERR_NETDOWN    -17 */
  "Address family not supported by protocol.",     /* ERR_AFNOSUPP   -18 */
  "Cannot assign requested address",               /* ERR_NOADDR     -19 */
  "Operation not supported on transport endpoint", /* ERR_OPNOTSUPP  -20 */
  "No route to the network",    /* ERR_NETUNREACH  -21 */
  "Connection request timedout", /* ERR_CONNECTIMEOUT -22 */
  "PIPE Error.",                /* ERR_PIPE       -23 */
  "AF not supported",           /* ERR_AFNOSUPPORT -24 */
  "Protocol not available",     /* ERR_NOPROTOOPT -25 */
  "Reserved for future use",    /* ERR_RESERVE1   -26 */
  "Reserved for future use",    /* ERR_RESERVE2   -27 */
  "Reserved for future use",    /* ERR_RESERVE3   -28 */
  "Reserved for future use",    /* ERR_RESERVE4   -29 */
  "Reserved for future use",    /* ERR_RESERVE5   -30 */
  "Reserved for future use",    /* ERR_RESERVE6   -31 */
  "Reserved for future use",    /* ERR_RESERVE7   -32 */
  "Connection aborted.",        /* ERR_ABRT       -33 */
  "Connection reset.",          /* ERR_RST        -34 */
  "Connection closed.",         /* ERR_CLSD       -35 */
  "Illegal argument.",          /* ERR_ARG        -36 */
  "Connection refused.",        /* ERR_CONNREFUSED -37 */
  "Invalid error code"          /* ERR_MAX_VAL    -38 */
};

/**
 * Convert an lwip internal error to a string representation.
 *
 * @param err an lwip internal err_t
 * @return a string representation for err
 */
const char *
lwip_strerr(err_t err)
{
  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) {
    return "Unknown error.";
  }
  return err_strerr[-err];
}

#endif /* LWIP_DEBUG */
